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ARS Home Office of Communications Images Photos Mar03





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Image Number K10334-1 Student assistant Susan Towery (right) measures oxygen levels in experimental catfish enclosures treated with herbicides to control off-flavor-forming cyanobacteria while Paul Zimba records the data. Changes in oxygen provide an early indication of the herbicides' effect on the algae. Photo by Peggy Greb.  640 pixels wide: (k10334-1.jpg)   Please visit our Image Gallery


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